摘要:
一些 1,3-二酮与肼衍生物的吡唑啉化合物的合成与表征,即 1-(S-苄基二硫代卡巴肼)-3-甲基-5-苯基-5-羟基吡唑啉 (1);1-(2-噻吩羧基)-3-甲基-5-苯基-5-羟基吡唑啉 (2);1-(2-thiophenecarboxylic)-3,5-dimethyl-5-hydroxypyrazoline (3); 1-(S-benzyldithiocarbazato)-3-methyl-5-phenylpyrazole (4); 1-(2-thiophenecarboxylic)-3-methyl-5-phenylpyrazole (5) and 1-(S-benzyldithiocarbazate)-3,5-dimethylpyrazole (6).通过红外光谱、(1H, 13C)-NMR光谱和单晶X射线衍射研究发现,化合物(1)、(2)和(3)是以吡唑啉的形式形成的,而(4)和(5)只有在酸性条件下才形成吡唑衍生物。化合物(1)以正交 P212121 结晶,a = 6.38960(10) 埃,b = 12.9176(3) Å, c = 21.2552(5) Å, (2) 结晶为单斜晶系,P21/n, a = 11.3617(2) Å, b = 8.4988(2) Å, c = 92.8900(10) Å and β = 92.8900(5)°, (3) 结晶为单斜晶系,C2/c, a = 15.9500(5) Å, b = 9.3766(3) Å, c = 16.6910(5) Å and β = 113.825(2)°, (4) 结晶为单斜晶系,P21/c, a = 15.228(4) Å, b = 5.5714(13) Å, c = 19.956(5) Å and β = 91.575(7)° and (6) crystallizes in orthorhombic, P212121, a = 5.3920(2) Å, b = 11.2074(5) Å, c = 21.885(1) Å.(3)衍生物是第一个由 2,4-戊二酮制备并具有晶体学特征的吡唑啉化合物。一些 1,3-二酮与肼衍生物的吡唑啉化合物的合成和表征,即 1-(S-苄基二硫代氨基甲酸酯)-3-甲基-5-苯基-5-羟基吡唑啉 (1);1-(2-噻吩羧基)-3-甲基-5-苯基-5-羟基吡唑啉 (2);1-(2-thiophenecarboxylic)-3,5-dimethyl-5-hydroxypyrazoline (3); 1-(S-benzyldithiocarbazato)-3-methyl-5-phenylpyrazole (4); 1-(2-thiophenecarboxylic)-3-methyl-5-phenylpyrazole (5) and 1-(S-benzyldithiocarbazate)-3,5-dimethylpyrazole (6).通过红外光谱、(1H, 13C)-NMR光谱和单晶X射线衍射研究发现,化合物(1)、(2)和(3)是以吡唑啉的形式形成的,而(4)和(5)只有在酸性条件下才形成吡唑衍生物。化合物(1)以正交 P212121 结晶,a = 6.38960(10) 埃,b = 12.9176(3) Å, c = 21.2552(5) Å, (2) 结晶为单斜晶系,P21/n, a = 11.3617(2) 埃,b = 8.4988(2) 埃,c = 92.8900(10) 埃和β = 92.8900(5)°,(3)结晶为单斜晶系,C2/c,a = 15.9500(5) 埃,b = 9.3766(3) Å, c = 16.6910(5) Å and β = 113.825(2)°, (4) 结晶为单斜晶系,P21/c, a = 15.228(4) Å, b = 5.5714(13) Å, c = 19.956(5) Å and β = 91.575(7)° and (6) crystallizes in orthorhombic, P212121, a = 5.3920(2) Å, b = 11.2074(5) Å, c = 21.885(1) Å.(3)衍生物是第一个由 2,4-戊二酮制备并具有晶体学特征的吡唑啉化合物。